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公开(公告)号：TW521857U
公开(公告)日：2003-02-21
申请号：TW89219788
申请日：1997-04-01
Applicant: SONY CORP
Inventor： TAKASAWA TAKEHARU , ITO HIROYUKI , SATO SHOJI , SETO HIDEKAZU , SUZUKI JUNICHI
CPC classification number: G11B7/1353 , G11B7/0925 , G11B7/0945 , G11B7/123 , G11B7/1356 , G11B7/1374 , G11B7/139 , G11B19/12 , G11B2007/0006
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公开(公告)号：ID25721A
公开(公告)日：2000-11-02
申请号：ID991033
申请日：1999-11-08
Applicant: SONY CORP
Inventor： TAKEDA TORU , KUMAI SATOSHI , MIKAMI TATSUO , UEHARA SYUJI , OKANISHI TOSHIHARU , OGAWA KENJI , NISHIDA NORIO , SATO SHOJI , SATO HIDEKI , ISHIKAWA HIDEKI , MUNEKATA KAZUMI , YANAMOTO KAORU , MINE NORICHIKA
Abstract: Disclosed herein are a disc recording medium (1), a recording apparatus and a playback apparatus, more concretely, the present invention provides a disc recording medium (1) wherein a circular track is created in advance to be used for recording data as a groove (GV) or a land (L), said track is wobbled to contain approximately fixed number of wobbling periods as counted in a longitudinal direction of said track, and said track includes rotational-angle marks each showing a predetermined rotational angular position on said disc recording medium. As a result, the precision and the reliability of recording can be attained.
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公开(公告)号：SG47219A1
公开(公告)日：1998-03-20
申请号：SG1997001019
申请日：1997-04-01
Applicant: SONY CORP
Inventor： TAKASAWA TAKEHARU , ITO HIROYUKI , SATO SHOJI , SETO HIDEKAZU , SUZUKI JUNICHI
Abstract: An optical pickup device which assures interchangeability between plural types of optical discs (2a, 2b) with different layered structures, such as CD, CD-R or DVD, which is reduced in size and which realizes reproduction of high reliability information signals. The pickup device includes a light source (3, 4) for radiating laser light beams of different wavelengths in association with the plural types of the optical discs (2a, 2b) with different layered structures, an objective lens (5a, 5b) for converging the laser light beam radiated form the light source on the signal recording layer of the optical disc (2a, 2b), an objective lens switching mechanism (14) for switching and moving the objective lens (5a, 5b) to the recording/reproducing position, light splitting means (44; 77) for splitting the incident laser light beam from the light source from the reflected laserlight beam reflected from the optical disc, plural photodetectors (6, 4) for receiving the reflected laser light split by the light splitting means, and an optical system correction means (16) for correcting the objective lens.
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公开(公告)号：CA2288596A1
公开(公告)日：2000-05-09
申请号：CA2288596
申请日：1999-11-08
Applicant: SONY CORP
Inventor： MUNEKATA KAZUMI , OGAWA KENJI , TAKEDA TORU , KUMAI SATOSHI , UEHARA SYUJI , OKANISHI TOSHIHARU , MIKAMI TATSUO , SATO SHOJI , MINE NORICHIKA , NISHIDA NORIO , ISHIKAWA HIDEKI , YANAMOTO KAORU
IPC: G11B7/24 , G11B7/007 , G11B7/26 , G11B19/247 , G11B20/10 , G11B27/19 , G11B27/24 , G11B27/30 , G11B7/0037
Abstract: Disclosed herein are a disc recording medium, a recording apparatus and a playback apparatus, more concretely, the present invention provides a disc recording medium wherein a circular track is created in advance to be used for recording data as a groove or a land, said track is wobbled to contain approximately fixed number of wobbling periods as counted in a longitudinal direction of said track, and said track includes rotational-angle marks each showing a predetermined rotational angular position on said disc recording medium. As a result, the precision and the reliability of recording can be attained.
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公开(公告)号：DE69729042T2
公开(公告)日：2005-04-28
申请号：DE69729042
申请日：1997-10-08
Applicant: SONY CORP
Inventor： NAKAGAWA TOSHIYUKI , INO HIROYUKI , YOSHIMURA SHUNJI , KAI SHINICHI , SHIMPUKU YOSHIHIDE , IIDA MICHIHIKO , KAWASHIMA TETSUJI , SATO SHOJI
Abstract: If there is any portion in channel bit data obtained on converting a signal read out from a recording medium into a bilevel signal which fails to satisfy a condition concerning a minimum run length or a maximum run length of the same symbol, the channel bit data is corrected to improve the bit error rate to secure a skew margin. To this end, channel bit data not satisfying a minimum run length d' of the same symbol is detected by a (d'-1) detector 4 using n-tupled clocks obtained on n-tupling channel clocks of playback data by a bit clock generator 2, where n is an integer not less than 2. A correction position of the channel bit data having the run length of the same symbol equal to (d'-1) is designated by a correction bit position designating unit 5. A data correction unit 6 then corrects the channel bit data so that the minimum run length of the same symbol will be equal to d'.
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Patent Agency Ranking
公开(公告)号：AU766600B2
公开(公告)日：2003-10-16
申请号：AU5836199
申请日：1999-11-08
Applicant: SONY CORP
Inventor： TAKEDA TORU , KUMAI SATOSHI , MIKAMI TATSUO , UEHARA SYUJI , OKANISHI TOSHIHARU , OGAWA KENJI , NISHIDA NORIO , SATO SHOJI , ISHIKAWA HIDEKI , MUNEKATA KAZUMI , YANAMOTO KAORU , MINE NORICHIKA
IPC: G11B7/24 , G11B7/007 , G11B7/26 , G11B19/247 , G11B20/10 , G11B27/19 , G11B27/24 , G11B27/30 , G11B27/32 , G11B20/16
Abstract: Disclosed herein are a disc recording medium (1), a recording apparatus and a playback apparatus, more concretely, the present invention provides a disc recording medium (1) wherein a circular track is created in advance to be used for recording data as a groove (GV) or a land (L), said track is wobbled to contain approximately fixed number of wobbling periods as counted in a longitudinal direction of said track, and said track includes rotational-angle marks each showing a predetermined rotational angular position on said disc recording medium. As a result, the precision and the reliability of recording can be attained.
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公开(公告)号：CA1030259A
公开(公告)日：1978-04-25
申请号：CA200233
申请日：1974-05-17
Applicant: SONY CORP
Inventor： SATO SHOJI , YOSHIDA KENJI , KIKUCHI KIYOSHI
IPC: B65H23/26 , G11B5/187 , G11B5/325 , G11B5/54 , G11B15/18 , G11B15/60 , G11B15/62 , G11B21/20 , G11B23/087 , G11B23/04
Abstract: A tape recorder is provided with an erasing head, a bearing member for rotatably journaling a pinch roller and a pinch lever for supporting the bearing member, all of them being integrally combined. The erasing head has its slidable contact surface projected into the tape path side with one of its side surfaces being faced to the peripheral surface of the pinch roller, and upper and lower flanges thereof projected over the slidable contact surface are used to guide a tape therebetween.
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公开(公告)号：DE2424621A1
公开(公告)日：1974-12-12
申请号：DE2424621
申请日：1974-05-21
Applicant: SONY CORP
Inventor： SATO SHOJI , YOSHIDA KENJI , KIKUCHI KIYOSHI
IPC: B65H23/26 , G11B5/187 , G11B5/325 , G11B5/54 , G11B15/18 , G11B15/60 , G11B15/62 , G11B21/20 , G11B23/087 , G11B5/48
Abstract: A tape recorder is provided with an erasing head, a bearing member for rotatably journaling a pinch roller and a pinch lever for supporting the bearing member, all of them being integrally combined. The erasing head has its slidable contact surface projected into the tape path side with one of its side surfaces being faced to the peripheral surface of the pinch roller, and upper and lower flanges thereof projected over the slidable contact surface are used to guide a tape therebetween.
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公开(公告)号：DE69729042D1
公开(公告)日：2004-06-17
申请号：DE69729042
申请日：1997-10-08
Applicant: SONY CORP
Inventor： NAKAGAWA TOSHIYUKI , INO HIROYUKI , YOSHIMURA SHUNJI , KAI SHINICHI , SHIMPUKU YOSHIHIDE , IIDA MICHIHIKO , KAWASHIMA TETSUJI , SATO SHOJI
Abstract: If there is any portion in channel bit data obtained on converting a signal read out from a recording medium into a bilevel signal which fails to satisfy a condition concerning a minimum run length or a maximum run length of the same symbol, the channel bit data is corrected to improve the bit error rate to secure a skew margin. To this end, channel bit data not satisfying a minimum run length d' of the same symbol is detected by a (d'-1) detector 4 using n-tupled clocks obtained on n-tupling channel clocks of playback data by a bit clock generator 2, where n is an integer not less than 2. A correction position of the channel bit data having the run length of the same symbol equal to (d'-1) is designated by a correction bit position designating unit 5. A data correction unit 6 then corrects the channel bit data so that the minimum run length of the same symbol will be equal to d'.
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公开(公告)号：MY115074A
公开(公告)日：2003-03-31
申请号：MYPI9701381
申请日：1997-03-31
Applicant: SONY CORP
Inventor： TAKASAWA TAKEHARU , ITO HIROYUKI , SATO SHOJI , SETO HIDEKAZU , SUZUKI JUNICHI
Abstract: AN OPTICAL PICKUP DEVICE WHICH ASSURES INTERCHANGEABILITY BETWEEN PLURAL TYPES OF OPTICAL DISCS (2A, 2B) WITH DIFFERENT LAYERED STRUCTURES, SUCH AS CD, CD-R OR DVD, WHICH IS REDUCED IN SIZE AND WHICH REALIZES REPRODUCTIONS OF HIGH RELIABILITY INFORMATION SIGNALS. THE PICKUP DEVICE INCLUDES A LIGHT SOURCE (3, 4) FOR RADIATING LASER LIGHT BEAMS OF DIFFERENT WAVE-LENGTHS IN ASSOCIATES WITH THE PLURAL TYPES OF THE OPTICAL DISCS (2A, 2B) WITH DIFFERENT LAYERED STRUCTURES, AN OBJECTIVE LENS (5A, 5B) FOR CONVERGING THE LASER LIGHT BEAM RADIATED FROM THE LIGHT SOURCE ON THE SIGNAL RECORDING LAYER OF THE OPTICAL DISC (2A, 2B), AN OBJECTIVE LENS SWITCHING MECHANISM (14) FOR SWITCHING AND MOVING THE OBJECTIVE LENS (5A, 5B) TO THE RECORDING/REPRODUCING POSITION, LIGHT SPLITTING MEANS (44, 47) FOR SPLITTING THE INCIDENT LASER LIGHT BEAM FROM THE LIGHT SOURCE FROM THE REFLECTED LASER LIGHT BEAM REFLECTED FROM THE OPTICAL DISC, PLURAL PHOTO DETECTORS (6, 4) FOR RECEIVING THE REFLECTED LASER LIGHT SPILT BY THE LIGHT SPLITTING MEANS, AND AN OPTICAL SYSTEM CORRECTION MEANS (16) FOR CORRECTING THE OBJECTIVE LENS (5A, 5B). FIG 6
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